Triple-piston deep-well pump.



L. T. HAMMOND.

TRIPLE PISTON DEEP WELL PUMP.

APPLICATION FILED FEB. 16. 1916- 1230, 1 55. Patented June 19, 1917.

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L. T. HAMMOND.

TRIPLE PISTON DEEP WELL PUMP.

APPLICATION FILED FEB. I6. 1916.

1,230,1 55. Patented June 19, 1917.

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U FF SA LORENZO 'I. HAMMOND, 0F COTUIT,'1VIAS$ACHUSETTS.

TRIPLE-PISTON DEEP-WELL PUMP.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed February 16, 1916. Serial No. 78,759.

America, and a resident of Cotuit, in the county of Barnstable and State of Massachusetts, have invented certain new and useful Improvements in TriplePiston Deep- Well Pumps, of which the following is a specification.

This invention relates to pumps and more especially to triple piston pumps for deep wells, and its main object is to provide a pump of this character in which a continuous stream of liquid may be secured at all times during the reciprocation of the pistons.

Another object of the invention is the provision of means whereby the pistonsmay be readily removed from the pump cylinder or tube.

A further object is to simplify the operating parts of the pump and arrange them in such a manner that a pump tube of small diameter may be used.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings:

Figure 1 represents a vertical section of a pump embodying the principles of the pres ent invention.

Fig. 2 represents an end elevation of the driving mechanism therefor.

Fig. 3 represents an elevation of the upper end of the pump tube and showing in elevation the guide for the piston operating rods.

Fig. 4 represents a vertical section of the lower end of the pump tube or cylinder with the check valve and lower piston therein.

Fig. 5 represents a similar section of a portion of said tube showing the upper and intermediate pistons and the means for preventing leakage between the sleeves of said pistons.

Fig. 6 represents a similar section of another portion of said tube, showing the means for preventing leakage between the sleeve of theintermediate piston and the operating rod of the lower pistonl Fig. 7 represents a horizontal section on line 7-7 on Fig. 6, and

Fig. 8 represents a horizontal section on line 8-8 on Fig. 5,

Similar characters d gn e like parts throughout the several figures of the drawings.

In the drawings, 10 is a tube having secured to its lower end a member 11 having an annular flange 12 therein provided with a valve seat 13 on which normally rests the check valve 14. This valve 14 has secured to its under face a plurality of spring fingers 15 which prevent the accidental dis placement of said valve while permitting limited vertical movement relatlvely to said annular flange 12. The upper face of the valve 14: is provided with a threaded coneshaped projection 16, the threads of which are adapted to engage wit-h the'threads of the opening 17 in a nut 18 suspended from the bottom of a plunger 19 by means of a plurality of arms 20 preferably formed integralwith said plunger 19. When desired the plunger 19 may be lowered and turned about its axis to cause the projection 16 to be screwed into the nut 18 so that when the plunger 19 is raised the check valve 14: will be removed from the member 11, the spring fingers 15 yielding sufiiciently to permit of their passage through the opening in the annular flange 12. The plunger 19 is made in two parts, the upper part 19 being threaded to the lower part 19 as indicated in Fig. 4 of the drawings. A flanged collar 21 surrounds the periphery of the part 19 Between the flange on the collar 21 and the annular shoulder 22 of the part 19 is a cup-shaped leather packing ring 23 and between the upper face of the collar 21 and the shoulder 24: on the upper part 19 is another cup-shaped packing ring WVhen the part 19 is removed from the part l9 these packing rings 23 and 25 and the collar 21 may be removed, and said packing rings may thus be replaced when worn sufficiently to cause leakage. The upper part l9 has two oppositely inclined faces 26, each provided with an opening 27 communicating with the interior of the parts 19 and 19 of the plunger 19.

Secured to the lower end ofeach face 26 by means of studs 28 is a valve member 29 preferably made of leather and stiffened by means of metal plates 30, 31 on opposite faces thereof, and secured thereto by the rivets 33. The inner plate 31 has formed thereon or secured thereto an inwardly projecting finger 34 in the path of the projections 35 formed upon a slidable member 36 mount d. in a tubula bearing 37 connected by webs 38 with the inner wall of the part 19. The lower end of the slidable member 36 is directly; above and alined with the threaded hole 17. In the ordinary downward movements of the plunger 19 the liquid passing through the center of said plunger will open the valves 29 and permit the liquid to pass upwardly through the openings 27 and the valves 29 will close on the upward stroke of the plungers. When in the operation of the removal of the plungers and the check valve 14 the projection 16 is screwed into the opening 17 of the nut 18, the upper end of said projection will strike against the lower end of the slidable member 36 and lift this member so that it will coact with the fingers 34 and open the valves 29 and retain said valves in open position until the nut 18 has again been unscrewed from the projection 16.

To the upper end of the member 19 is secured a rod 39 which extends the entire length of the tube 10 and projects through the stufiing box 41 in the housing 42 at the upper end of said tube 10. This rod 39 is provided with a collar 43 which is adapted to engage with the fingers 44 on the valves 45 secured to the intermediate plunger 46. This plunger 46 is constructed substantially the same as the plunger 19 with the exception that it has no central bearing 37 or nut 18 suspended therefrom.

When the intermediate plunger 46 is lowered into contact with the upper face of the plunger 19 the collar 43 by engagement with the fingers 44 will open the valves 45 and retain them in open position.

The plunger 46 is secured to the lower end of a sleeve 47 surrounding the rod 39. This sleeve 47 has secured thereto a collar 48 which is adapted under abnormal conditions to engage with the fingers 49 on the valves 50 secured to the upper plunger 51. This plunger 51 is constructed in the same manner as the plunger 46. To the upper end of the plunger 51 is secured a sleeve 52 surrounding the inner sleeve 47 and to the upper end of this sleeve 52 is secured a member 53 provided with a stuffing box 54 adapted to prevent leakage between the sleeves 52 and 47. Secured to the member 53 is a rod 55 extending upwardly the entire length of the tube and through the stuffing box 41 in the housing 42. The upper end of the sleeve 47 is also provided with a member 56 having a stufiing box 57 adapted to revent leakage between the sleeve 47 and tie rod 39. To this member 56 is secured a rod 58 extending upwardly the entire length of the tube 10 and through the stuffing box 41 in the housing 42. The rods 39, 55, and 58 extend upwardly through a guide member 59 formed upon a frame 60. The rod 58 is provided with a lateral projection 61 positioned in the slot in the'end of a lever 62. The rod 39 is provided with similar lateral projections positioned in slots in the forward bifurcated end of the lever 63 and the rod 55 is provided with a similar lateral projection positioned in the slot in the forward end of a lever 64.

These levers 62, 63, and 64 are all mounted upon a pivot pin 65 in the support 66. The opposite ends of the levers 62, 63, and 64 are connected by links 67, 68, and 69 respectively to the cranks 70, 71, and 72. These cranks are mounted in alined bearings 73 and are provided at one end with a handle lever 74 by which they may be manually operated. On theopposite side of the frame 60 the cranks are provided with a grooved wheel 75 by which said cranks may be rotated from any suitable motor. When power is applied to rotate the cranks 7 0, 71, and 72, the levers 62, 63, and 64 are oscillated about the pivot 65 and cause the plungers 19, 46, and 51 to be reciprocated in the tube 10.

As one of these plungers is always on its upward stroke it is obvious that while the driving mechanism is in operation a continuous stream of liquid will be emitted through the outlet 76. If it is desired to change the leverage of the levers 62, 63, and 64, the pivot pin 65 may be removed and inserted in either of the openings 77 or 78 in said levers, the supporting member 66 at the same time being moved longitudinally of the frame 60 and secured in new position by means of the securing members 79. It is obvious that by changing the position of the pin 65 the stroke of the plungers 19, 46, and 51 will be changed.

The outer sleeve 52 is only of sufiicient length to provide a suitable bearing surface therefor during the reciprocatory movement of the plunger 51, and the sleeve 47 extends above the member 53 a distance only sufiicient to permit the reciprocation of the intermediate plunger 46 without the member 56 contacting with the member 53. By means of this construction and operating the plungers through the rods 39, 55, and 58, all of the working parts may be confined with in a tube of very small diameter, as for instance, a 2 inch pipe. This could not be accomplished if the rod 39 and the sleeves 47 and 52 continued the entire length of the pipe, as in such a case unions would be required to connect the various sections and consequently the inner sleeve would necessarily have to be sufiiciently large to accommodate the unions on the rod 39 and the outer sleeve 52 would have to be of sufiicient size to accommodate the unions on the sleeve 47 By making it possible to dispense with these unions on the sleeves 47 and 52 the rod 39 may closely fit the bore of the sleeve 47 and the sleeve 47 may closely fit the bore of the sleeve 52.

This construction gives greater rigidity to 130 the plunger supports. As the operating rods 39, 55, and 58 are separated as indicated at the upper end of Fig. 6 of the drawings, it is obvious that the various sections of these rods may be connected by unions or couplings without conflict with each other.

When it is desired to remove the plungers and check valve for any reason the levers 62, 63, and 6a are disengaged from the rods 39, 55, and 58, and the plungers are lowered until the upper plunger 51 comes into contact with the intermediate plunger 4:6 and said intermediate plunger comes into contact with the plunger 19.

In moving these plungers into position relatively to each other the member 48 will open the valves 50 and the member 43 will open the valves 45. When the lower plunger 19 with the plungers 46 and 51 superimposed thereon. is lowered into engagement with the projection 16 and the slid-able member 36 is moved upwardly, the valves 29 will also be opened. It will be obvious, therefore, that when the rod 39 with the plungers 19, 46, and 51 thereon, is raised, all of the valves will open to permit a free passage of the water through said plungers.

When the pump is operated and the water is below the check valve 14 a suction will be created to draw the water through the opening in the annular flange 12 and when suflicient water has been thus drawn into the lower end of the tube 10 to cover all three of the plungers, a constant stream of water may be delivered thereafter from the outlet 76. During the rotation of the cranks 70, 71, and 72, at least one plunger is always on its upper stroke, and as a consequence there is no loss in the'power efficiency.

It is believed that the operation and many advantages of this invention will be fully understood from the foregoing description.

Having thus described my invention, I

; claim:

1. In a device if the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed; a threaded nut secured to the under side of the lower ried by the lower plunger adapted to be engaged by said projection and open the valve in saidplunger; operating members secured to said plungers; and projections on the operating members of the lower and intermediate plungers for opening the valves in the intermediate and upper plungers respectively when the latter plungers are moved into contact with the first mentioned plungers.

2.- n a device of the class described, the

combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed; a threaded nut secured to the under side of the lower plunger; a check valve at the bottom of said tube provided with a threaded projection adapted to be screwed into said nut and extend therethrough; a movable member carried by the lower plunger adapted to be engaged by said projection and open the valve in said plunger; operating members secured to said plungers; and annular cam projections on the operating members of the lower and intermediate plungers for opening the valves in the intermediate and upper plungers respectively when the latter plungers are moved into contact with the first mentioned plungers.

3. In a device of the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed; operating members secured to said plungers; and annular cam projections on the operating members of the lower and intermediate plungers for opening the mixes of the intermediate plungers respectively when the latter plungers are moved into contact with the first mentioned plungers.

4. In a device of the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed; operating members secured to said plungers; annular cam projections on the operating members of the lower and intermediate plungers for opening the valves of the intermediate plungers respectively when the latter plungers are moved into contact with the first mentioned plungers; and means for opening the valves of the lower plunger when it is about to reach its extreme lowest position.

5. In a device of the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed; operating members secured to said plungers; annular cam projections on the operating members of the lower and intermediate plungers for opening the valves of the intermediate plungers respectively when the latter plungers are moved into contact with the first mentioned plungers; and a movable member carried by the lower plunger for opening the valves thereof when said plunger is about to reach its extreme lowest position.

6. In a device of the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed and having an inwardly extending finger; operating members secured to said plungers; and annular cam projections on the operating members of the lower and intermediate plungers adapted to coact with said fingers and open the valves of the intermediate plungers respectively When the latter plungers are moved into contact With the first mentioned plunger-s.

7. In a device of the class described, the combination of a tube; three alined plungers therein, each plunger being provided with a valve normally closed and having an inwardly extending finger; operating members secured to said plungers; annular cam projections on the operating members of the lower and intermediate plungers adapted to coact With said fingers and open the valves of the intermediate plungers respectively when the latter plungers are moved into contact With the first mentioned plungers; and a movable member carried by the lower plunger adapted, When said plunger is reaching its lowest position, to coaet With the finger on the valve of the lowest plunger to positively open said valves.

Signed by me at t Post O'flice Sq, Boston, Mass, this 14th day of February, 1916.

LORENZO T. HAMMOND.

\Vitnesses WALTERE. LOMBARD, NATHAN O. LOMBARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

